Electron Spin Resonance of a Gd-doped CaWO<sub>4</sub> crystal coupled to on-chip superconducting resonators.

ORAL

Abstract

Hybrid quantum systems based on solid state spin ensembles presents as promising candidates for quantum memories due to their long coherence times1 and possibility to perform multi-state qubit operations due to their rich energy levels2. We present the coupling of coplanar stripline geometry superconducting resonator to the well-defined qubit states of Gd hosted in a CaWO4 single crystal. A number of transitions between the ground and an excited state of the electronic multiplet 8S7/2 of Gd3+ were studied by continuous-wave spectroscopy of the cavity resonance field dependence (B0 ⊥ c). Numerical calculations allowed to finely tune the high-order zero-field splitting parameters for the spin Hamiltonian at T ≈ 0.5K.

1 S. Bertaina, et al., arXiv:2001.02417 (2020).
2 E.I. Baibekov, et al., Phys Rev B 95, 064427 (2017).

*The National High Magnetic Field Laboratory is supported by the National Science Foundation through NSF/DMR-1644779 and the State of Florida. We acknowledge the Frontier Science Key Programs of the CAS, grant No. QYZDY-SSW-JSC033.

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Presenters

  • Giovanni Franco-Rivera

    • Department of Physics and The National High Magnetic Field Laboratory, Florida State University

Authors

  • Giovanni Franco-Rivera

    • Department of Physics and The National High Magnetic Field Laboratory, Florida State University

  • Josiah Cochran

    • Department of Physics and The National High Magnetic Field Laboratory, Florida State University

  • Lei Chen

    • Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Shanghai, China

  • Zhen Wang

    • Center for Excellence in Superconducting Electronics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Shanghai, China

  • Bertaina Sylvain

    • Inst. Mat. Microelectronique et Nanosciences de Provence, Aix-Marseille Universite, Marseille, France
    • Inst Mat Microelectronique et Nanosciences de Provence, UMR7334, CNRS, Aix- Marseille Universite, Marseille, France
    • IM2NP, Faculté des Sciences et Techniques, Marseille, France

  • Irinel Chiorescu

    • Department of Physics and The National High Magnetic Field Laboratory, Florida State University
    • Dept of Physics and The National High Magnetic Field Laboratory, Florida State Univ